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This article introduces the relevant knowledge of "what is the difference between WebLogic, WebSphere, JBOSS and Tomcat". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The difference between WebLogic, WebSphere, JBOSS and Tomcat

1: product introduction:

WebLogic is an application server produced by American bea company. To be exact, it is a middleware based on j2ee architecture. BEA WebLogic is a Java application server for developing, integrating, deploying and managing large-scale distributed Web applications, network applications and database applications. The dynamic function of Java and the security of Java Enterprise standard are introduced into the development, integration, deployment and management of large-scale network applications.

WebSphere is the integrated software platform of IBM. It includes writing, running, and monitoring on demand Web applications for round-the-clock industrial strength and the entire middleware infrastructure, such as servers, services, and tools, required for cross-platform, cross-product solutions. WebSphere provides reliable, flexible and robust integration software.

JBoss is a container and server that manages EJB and supports EJB 1.1, EJB 2.0, and EJB3.0 specifications. However, JBoss core services do not include WEB containers that support servlet/JSP and are generally used with Tomcat or Jetty bindings. In 2006, Jboss was acquired by Redhat.

Tomcat is a core project of the Jakarta project of the Apache Software Foundation, which is jointly developed by Apache, Sun and other companies and individuals. With the participation and support of Sun, the latest Servlet and JSP specifications are always reflected in Tomcat, and Tomcat 5 supports the latest Servlet 2. 4 and JSP 2. 0 specifications Because of its advanced technology, stable performance and free, Tomcat is deeply loved by Java lovers and recognized by some software developers, and has become a popular Web application server.

2: different prices:

JBoss and Tomcat are free. WebLogic and WebSphere are free and expensive.

3: the open source is different:

JBoss and Tomcat are completely open source, while the other two are not.

4: support for technology:

Tomcat does not support EJB,JBoss is to implement the EJB container, and then integrate Tomcat. Both WebLogic and WebSphere fully support a variety of standards in the industry, including EJB, JSB, JMS, JDBC, XML and WML, making it easier to implement Web applications and protect investment, while also making it easier to develop standards-based solutions.

5: differences in scalability:

Both WebLogic and WebSphere are known in the industry for their highly scalable architectures, including sharing of client connections, resource pooling, and clustering of dynamic web pages and EJB components.

6: the difference in the scope of application:

Tomcat is a small and lightweight application server, which is widely used in small and medium-sized systems and not many concurrent access users. It is the first choice for developing and debugging JSP programs. WebLogic and WebSphere are commercial software with complete and powerful functions, which are mainly used in large-scale projects of large enterprises. JBOSS is mainly used in small and medium-sized companies with EJB services.

7: the difference between business services and technical support:

Because JBoss and Tomcat are open source and free, both of them do not have any commercial services and technical support, and the technical documentation and related services of WebLogic and WebSphere are still in place. If something goes wrong with your server one day, as long as you can afford it, their technical engineers will appear in front of you immediately.

8: security issues

Because both JBoss and Tomcat are open source, their security is relatively low, and you can't claim from Apache if there are any vulnerabilities in the application server itself. The fault tolerance, system management and security performance of WebLogic and WebSphere have been verified in thousands of mission-critical environments around the world.

9: close integration with the database:

If the cost of hardware is much higher than that of software, it is better to use Weblogic/Websphere. The reason is too simple, why companies such as telecom / banking / mobile use Oracle or DB2 databases instead of mysql. Tomcat alone can not support so many concurrency, if you have money, you should choose commercial products.

The above briefly describes the differences between these web servers from nine aspects.

It is worth mentioning that Tomcat, WebLogic, Websphere and Jboss are also called middleware. To put it simply, middleware is the bridge between operating systems and applications. Without middleware, the applications you write (mainly web application and J2EE) cannot run.

How awesome is the middleware technology that won the second prize for national scientific and technological progress?

The first middleware we know is something called Tuxedo, which is essentially a transaction middleware. In 1998, IDC had a definition of middleware and divided it into six categories according to its use. Today, there are only message middleware and transaction middleware, and the others have been gradually integrated into other products and wrapped up, and there is no separate product form in the market.

Around the year 2000, the Internet became popular, and a new thing came into being, that is, the application server. In fact, transaction middleware also belongs to application server. in order to distinguish, the traditional transaction middleware is called distributed transaction middleware, because it is mainly used in distributed environment, and the new application server is called J2EE middleware, which is a very popular product in the market so far.

After the concept of EAI comes out, some new software products are introduced in the market, such as workflow, Portal, etc., but they don't know how to classify them, they can't be classified into applications, and they can't be classified into operating systems, so they are classified as middleware, so the concept of middleware is expanded. At present, there are different opinions on middleware in the market, which objectively leads to the complexity of understanding.

Nowadays, many new concepts have been introduced in the market, such as three-tier structure, components, and Web services, among which SOA (Service-oriented Architecture) is the most popular. In fact, they are not a product, but a technical implementation method and a methodology for developing a software. We know that the earliest method of software development is programming and writing code, and its disadvantage is that it can not be reused. Therefore, a component-based software development method is proposed, which encapsulates some common functions in programming and standardizes a unified interface for other programs to call. For example, if we develop a new software, we may need to use component 1, component 2 and component 3, so we only need to assemble it locally. We can get the application software we want. After the popularization and attention of the Internet, the software development method has a new development on the basis of componentization. The core idea is that software does not need to include components, but only needs the running results of components. For example, if you write a communication and transmission software, you can look for components on the Internet, put forward service requests, get the results and return, instead of downloading components and packaging them. This is now called SOA. If you want to realize SOA, it is necessary to standardize the component interface and the service results submitted by the component, so that the new idea of software development can be feasible. But SOA is not a product, but a way of thinking, and the basis for implementing this approach now seems to be only middleware.

So, what exactly is middleware and what is not middleware? Middleware should have two key characteristics: first, it should serve the upper application layer, which is a basic condition; in addition, it must be connected to the operating system level, but keep running and working state. Only with these two characteristics can we call it middleware.

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